Friction and wear behavior of electroless Ni–P and Ni–W–P alloy coatings

Palaniappa, M.; Seshadri, S.K.

doi:10.1016/j.wear.2008.01.002

Cited by 192 publications

(122 citation statements)

References 21 publications

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“…Tungsten co-deposition in Ni-P matrix has been tested by different authors with the aim at obtaining improved surface properties, especially regarding corrosion and wear characteristics, consolidating and expanding the industrial applications of Ni-P alloys. Palaniappa and Seshadri 13 showed that tungsten addition enhanced the wear resistance of electroless Ni-P coatings due to solid solution strengthening of the nickel matrix with the incorporation of tungsten. Furthermore, tungsten addition reduces the phosphorus content of the film and modifies its crystalline structure 14 .…”

Section: Introductionmentioning

confidence: 99%

Influence of the Tungsten Content on Surface Properties of Electroless Ni-W-P Coatings

Oliveira

Corrêa

Ett³

et al. 2017

Mat. Res.

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Ternary Ni-W-P films were produced by electroless deposition using baths with different tungsten concentrations. After deposition, the coated surfaces were annealed at 400°C for 1h. Surface morphology and film composition in the as-plated condition were assessed by SEM and EDS analyses, respectively. The crystalline phases after annealing were investigated by X-ray diffraction (XRD). Nanoindentation tests were performed to assess the mechanical properties of the deposited films. Surface roughness was determined by confocal laser scanning microscopy (CLSM). Friction coefficient was evaluated by reciprocating were tests in a nanotribometer. The corrosion behavior was evaluated by potentiodynamic polarization curves. The results showed that the surface morphology, crystallization behavior and corrosion resistance were affected by the tungsten content in the film. The best corrosion performance was obtained for the ternary films after annealing. Hardness, surface roughness and friction coefficient were dependent of the tungsten concentration in the film.

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Section: Introductionmentioning

confidence: 99%

Influence of the Tungsten Content on Surface Properties of Electroless Ni-W-P Coatings

Oliveira

Corrêa

Ett³

et al. 2017

Mat. Res.

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“…Estudos também já demostraram que tratamentos térmicos em temperaturas superiores a 450ºC ocasionam um efeito deletério na resistência ao desgaste de revestimentos de Ni-P, devido principalmente ao crescimento de grão do material e pela formação de compostos intermetálicos indesejáveis na interface substrato/revestimento [14,15], e que tratamentos em temperaturas inferiores a 300ºC não atuam de modo positivo na resistência ao desgaste, muito devido a não chegada na janela de temperaturas responsáveis pela transformação de fases em revestimentos de Ni-P [8,15].…”

Section: Influência Do Tratamento Térmico Na Resistência Ao Desgaste unclassified

“…Esta diminuição do COF para revestimentos de Ni-P após o tratamento térmico provavelmente está associada com a formação de uma fina camada de óxidos na superfície devido ao aquecimento durante o tratamento. Estes óxidos agiriam como lubrificantes naturais, favorecendo a diminuição do COF [14]. Importante ressaltar que esta formação de óxidos só foi evidenciada quando o tratamento térmico é realizado em atmosfera não controlada, ou seja, com oxigênio abundante [4,8].…”

Section: Amostraunclassified

Influência Do Tratamento Térmico Na Resistência Ao Desgaste De Revestimentos De Níquel Químico Com Alto Teor De Fósforo

Goettems¹,

Ferreira²

2017

Tecnologia Em Metalurgia Materiais E Mineração

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ResumoNo presente trabalho foi avaliada a resistência ao desgaste de revestimentos de níquel químico com alto teor de fósforo (9-10% P) após passar por três diferentes condições de tratamento térmico, incluindo a condição de como depositado, ou seja, sem tratamento posterior. Os tratamentos foram realizados nas temperaturas de 320ºC, 400ºC e 500ºC em diferentes tempos, sendo estas condições escolhidas com base no resultado do ensaio de calorimetria exploratória diferencial (DSC). Feito isso as amostras foram então caracterizadas através do ensaio de desgaste do tipo "ball on plate", para depois suas trilhas de desgaste serem avaliadas em microscópio. Ao final, chegou-se à conclusão de que o tratamento térmico afeta de forma positiva a resistência ao desgaste dos depósitos de Ni-P, tendo como 320ºC por 9 horas e 400ºC por 1 hora as condições que apresentaram o melhor resultado. Este fato se deve a transformação de sua estrutura amorfa para uma estrutura cristalina de níquel com precipitados de Ni 3 P ocorrida entre 320ºC e 360ºC, verificada através da difração de raios-X (DRX). Palavras-chave: Revestimento metálico; Resistência ao desgaste; Níquel químico; Tratamento térmico. EFFECT OF HEAT TREATMENT ON THE WEAR BEHAVIOUR OF ELECTROLESS HIGH PHOSPHORUS NICKEL COATING AbstractIn this present work was studied the influence of heat treatment on the wear resistance of electroless high phosphorus nickel coating (9-10% P wt.). Three different treatment conditions as well as untreated condition were evaluated at temperatures of 320ºC, 400ºC and 500ºC under different holding times. The selection of the heat treatment conditions was chosen considering the result obtained by a differential scanning calorimetry (DSC) analysis. The wear behaviour of the Ni-P samples was investigated through a non-lubricated ball on plate test and the results showed that the heat treatment affect positively the wear resistance of Ni-P coatings. Treatment conditions of 320ºC with 9 hours holding time and 400ºC with 1 hour holding time showed the best results due to a structural change from amorphous supersatured solid solution of phosphorus in nickel to a crystalline structure of nickel crystallites and nickel phosphides (Ni 3 P) occurred between 320ºC and 360ºC verified after X-ray analysis. Keywords: Metallic coatings; Wear resistance; Nickel electroless; Heat treatment. INTRODUÇÃONas últimas décadas houve um crescente aumento na busca por revestimentos metálicos com aplicação na engenharia capazes de apresentar boas propriedades mecânicas em situações severas de aplicação, incluindo-se neste grupo de propriedades a resistência ao desgaste, permitindo que seja possível aliar características especificas do substrato com outras em que só seja possível atingir através da aplicação de outro material.Um tipo de revestimento que está recebendo atenção especial nos últimos anos devido à sua grande versatilidade é o níquel químico, que vem ganhando mais e mais espaço em diversos setores da indústria tais como automotiva, alimentícia, extrativa, óleo...

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“…The properties and microstructures of chemically deposited coatings depend on the amount of phosphorus alloyed in the deposit and postdeposition heat treatment. The structure of as-plated coatings has been reported to be either crystalline or amorphous, or a mixture of both [5]. A remarkable improvement in the wear resistance of the binary coating has been reported when hard particles are incorporated [6].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Multiple Roughness Characteristics of Chemically Deposited Ni-P-W Coating Using Weighted Principal Component Analysis

Roy

Sahoo

2012

ISRN Mechanical Engineering

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The present investigation deals with the chemical deposition of Ni-P-W coating on mild steel substrate and optimization of multiple surface roughness characteristics on the basis of different coating process parameters. Three coating parameters which are varied to have the optimum condition are concentration of nickel source, concentration of reducing agent, and concentration of tungsten source. Five different roughness parameters, namely, centre line average (R a ), root mean square roughness (R q ), skewness (R sk ), kurtosis (R ku ), and mean peak line spacing (R sm ) are considered. Weighted principal component analysis (WPCA) method is adopted to convert the multiple-response problem into a single performance index and Taguchi L 27 orthogonal array is used. ANOVA is performed to find the significance of the each coating process parameters and their interactions. The EDX analysis, XRD analysis, and SEM are performed to study the composition and structural aspects.

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Friction and wear behavior of electroless Ni–P and Ni–W–P alloy coatings

Cited by 192 publications

References 21 publications

Influence of the Tungsten Content on Surface Properties of Electroless Ni-W-P Coatings

Influence of the Tungsten Content on Surface Properties of Electroless Ni-W-P Coatings

Influência Do Tratamento Térmico Na Resistência Ao Desgaste De Revestimentos De Níquel Químico Com Alto Teor De Fósforo

Optimization of Multiple Roughness Characteristics of Chemically Deposited Ni-P-W Coating Using Weighted Principal Component Analysis

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